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Finding the Fourth Proportional to 19,350, 26,708.70 and 12,636.66

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Solution

The fourth proportional to 19,350, 26,708.70 and 12,636.66 is: 17,442.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,350 : 26,708.70 = 12,636.66 : x
  2. Step 2: Convert to fraction form
    19,350/26,708.70 = 12,636.66/x
  3. Step 3: Cross multiply
    19,350x = 26,708.70 × 12,636.66
  4. Step 4: Simplify right side
    19,350x = 337,508,760.94
  5. Step 5: Solve for x
    x = 337,508,760.94/19,350
  6. Step 6: Final answer
    x = 17,442.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.